Method of recovering resin from waste products.



P. L. HUGGINS. METHOD OF BEGOVERING RESIN FROM WASTE PRODUCTS. APPLICATION FILED JAN. 13. 1912.

,022, 1 94'. Patented Apr. 2, 1912.

UNITED $TAH1S PATENT OFFICE.

FRANK L. I-IUGGINS, OF WILMINGTON, NORTH CAROLINA, ASSIGNOR F ONE-HALF TO JOHN P. MOORE, B,, OF 'WILMINGTON, NORTH. CAROLINA.

METHOD OF RECOVERING RESIN FROM 'WAS'I'E PRODUCTS.

To all whom it may concern:

Be it known that I, FRAuK L. Humans, a citizen of the United States, and resident of "Wilmington, county of New Hanover, State of North Carolina, have invented certain new and useful Improvements in Methods of Recovering Resin from aste .lrodnets, of which the following is a specification.

This invention is designed to ell'cctively recover the rosin which is contained in what are now regarded as waste products. For instance, the dross separated from crude turpentine prior to distillation contains considerable rosin and dilliculty has been experienced in properly recovering it. This is true also of other material including rosin mixed with foreign matter, such as dirt, in such way that separation is dillicult and my in vention is adapted for use upon all mate rial of such character.-

My method of recovery involves the use of simple mechanism or apparatus and is not only easy to perform but accomplishes the desired separation and recovery cll'ectively. A

The novel features of the invention will be apparent from the following description taken in connection with the drawing.

The single figure of the drawing is a diagrammatic viewpartly in section, showing an arrangement of apparatus which may be used in carrying out the method.

In the drawing 1 have shown a chamber l which I term a fdigcstcr and which'is preferably made in the -lform at a vertical cylinder having a foramii'ious screen 2 near its bottom. 'ihere is a steam jacket 3 around the Sides and bottom ol the chamber provided with steam inlet 4.- aud a trap drain 5 at the bottom. There is a manhole Ll/ll) top provided. with a cover 6 providing means for admitting successive supplies of thema-terial to be treated. An outlet is also provided in'thc side of the chamber immediately above the screen 2 provided with the door 50 for the purpose of removing the residue of solid matter remaining in the chamber after my treatment. This chamber 1 is provided with a pressure'gagc 7 and a transparent tube S for indicating the height of liquid within the chamber and the steam jacket 3 is rovidcd with a safety-valve 9.

. Two tan cs 10 and 11 for containing a solvent of rosin are placed preferably at a Specification of Letters Patent.

Application filed January 13, 1912.

Patented Apr. 2, 1912.

Serial No. 671,058.

13, comn'iunicating with the pipe let which I in turn connects with pipe 15 leading into the top of the chamber 1 and since these pipes are provided with suitable valves the solvent may be admitted froni eithcr one of the tanks 10 and 11 to the chamber 1. A pi pc 16 leads from the bottom o'l'xthe chamber but below the screen 2 and it is connected to the pipe 17 leading up above the tanks 10 and'll and having connections 18 and 19 therewith so that the liquid when it is forced out through the pipe 16 at the bot tom of the chamber will pass up to the tank 10 or it in accordance with which of the valves is open. A pipe 20 also connects with the outlet pipe 16 and leads to a still 21 where the material consisting of the solvent saturated. with rosin is distilled in order to separate and remove the rosin. A steam pipe connects with the outlet pipe 16 whereby steam may be forced into the bottom of the cl'ian'iber l and a vapor outlet pi pc 23' connects with the chamber at the top and connects with a condensing coil 24lin the chamber in"), adapted to contain a cooling material such as water. The condensed steam and vsolvent passino through the coil Z-l enters the separator 2b where the solvent and water are separated, the inlet pipe being provided with a trap 27 and the trap 28 bein; also placed at the bottom of the separator. A pipe 29 is also connected to the inlet pipe for the purpose of a vent for vapor. The condensed solvent passes from the separator 36 into the tank 30.

through coil 3% pass into the separator 3 where the water is separated from the solvent and it will be seen that the connecting pipe is provided with the vent pipe 38 for vapors. The solvent from the separator 37 passes down into the solvent tank 30 through the opening 51 shown in its top from which it may be forced back up to the tanks 10 and 11 by means of the pipe 39, the force pump 40, the pipe 41 and the pipe 14.

In carrying out my method in the apparatus above described, the operation is as follows: Gasolene or other solvent is placed in the two tanks 10 and 11, thus having two separate supplies ofthe solvent. The chamher 1 is charged with the waste product containing rosin as described and the manhole 6 and valves in the pipes are closed and the solvent from tank 11 is then allowed to pass down into the chamber 1 so as to almost submerge the entire charge of material. Steam is admitted to the jacket 3 so as to boil the solvent in contact with the material so as to quickly dissolve the rosin which it contains, it being understood that the valve 23 is open during the admission of the solvent and during the boiling operation so as to permit the escape of any pressure-or vapor through the pipe connection to the condenser 2a where it is recovered. The valves in the outlet pipes 16 and 17 are opened when the extraction is complete, valve 23 closed and steam is admitted to the upper portion of the chamber 1 by means of the pipe 42, the pressure of this steam serving to force the partly saturated solvent down through the screen 2 in the outlet 16 and back up to the tank 11. When the solvent has been forced out the outlet pipe is closed and the valves in pipes 22 and 23 are opened whereby steam will be forced into the bottom of the chamber through the outlet 16 and will pass up over the remaining portion of the material, removing therefrom the particles of solvent which still adhere to it, the steam carrying these particles ofsolvent out through the pipe 23 and into 'the condensing coil 24 and from there to the separator 26 where the solvent is recovcred. The residue of the charge of material thus treated in the chamber 1 is then removed through the door 50 and a new charge is placed in the chamber. The "partly saturated solvent in tank 11 is then permitted to down into the chamber 1 Sons to submerge the new charge of mate- After being heated as above described, so as to dissolve the rosin the solvent is again forced out through the outlet at the bottom and back to the tank 11 by steam pressure admitted through the pipe 4-2.. The outlet pipe is then closed and a supply of fresh solvent in tank 10 is pcrmitted to pass down into the chamber 1, thus subjecting the charge of material to the action of this new supply of solvent.

This second supply of solvent is then forced out through the bottom by steam pressure as above described and back into tank 10. Steam is then admitted through-pipe 22 to the bottom of the chamber 1 and passes as above described up through the material and out through the pipe 23 to the condenser and separator. chamber 1 is then removed and a new charge is placed in the chamber. The partly saturated solvent in tank 11 is then passed down into the chamber 1 over the material so as to submerge it and so that it will partly remove the rosin contained in it. It will be observed that the solvent now in the chamber 1 has been used to successively treat three new charges of material and it is therefore suiiiciently saturated with rosin. The valve in pipe 20 is then opened and steam is admitted through pipe 42, thus forcing the saturated solvent into the distilling apparatus 21 where, as above de scribed, the rosin is separated from the solvent and the solvent'is recovered in the condensing coil 34 and separator 37. The recovered solvent which passes down to the solvent t: iii; 30 is then forced by pump 40 back to the tank 11, where it is ready for use again. The partly saturated solvent in tank 10 is passed down into chamber 1 to act on the charge of material which had been acted-on by the solvent from tank 11. This solvent from tank 10 is then forced out from the chamber 1 back into the tank 10 and the material remaining is subjected to the action of steam admitted through the pipe 22 as heretofore described. A new supply of material is then placed in the chamber 1 and the operation as above described is continued. It will be observed that this method of operation gives me a continuous process involving the use of two tanks for solvent and that after the first charge of waste product material each separate supply of solvent is made to successively submerge and act upon 3 char 'es of material and each charge of material is acted on by two supplies of solvent.

Having thus described my invention what i claim is:

1. The herein described continuous process which consists in placing material containing rosin in a closed chamber having an outlet pipe at the bottom, admitting a solvent to said chamber from a solvent tank to submerge said material heating said chamber, admitting steam to the upper part of said chamber to expel said solvent through said outlet back to said solvent tank passing steam up through the residue of said material in said clrau'ibcr, removing said residue and placing a fresh supply of material in said chamber, admitting said previously used solvent to said chamber to submerge said fresh supply of material forcing The residue in the lot said solvent through said outlet back to said solvent tank, admitting fresh solvent from a second tank to said chamber, forcing said second supply of solvent by steam pressure through said outlet back to its tank, passing steam up through the residue of material, removing said residue from said chamber and placing a fresh supply of material therein, admitting said first mentioned supply of solvent to said chamber to submerge said fresh supply of material forcing said saturated solvent by steam ressure through said outlet to a still, distilling said solvent to separate the contained rosin, condensing'said solvent and forcing it back to I said solvent tank.

2. The process of recovering rosin from Waste products of the kind described consisting in dividing a quantity of solvent into two se arated supplies, submerging successively t ree charges of said material with one supply of solvent, submerging the second and third of said charges of material successively with said second supply of solvent, distilling the first supply of solvent to separate the rosin, submerging a fourth charge of material with said second supply of solvent, and distilling said second supply of solvent.

In testimony whereof I aflix my signature 30 in presence of two witnesses.

FRANK L. HUGGINS.

Witnesses:

C. D. WEEKS, M. S. WILLSON. 

